White-Rodgers model 770-1 pressure sensing air flow switch with a range of 0.07 to 12 inches W.C. The switch action SPDT can be triggered by either positive or negative pressure, or differential pressure. The design prevents fluttering or malfunctions typically associated with sail switches due to shock or vibration. Includes 12” of ¼" plastic tubing and compression fittings. Includes 2” of 3/8” tubing that works as a sleeve over the ¼" tubing. Overall size 6 x 4½ x 3" (including mounting bracket). Includes 2 mounting screws. Must be mounted in the vertical position. Suitable for both residential and commercial installations, including: electronic air cleaners, power humidifiers, process drying, refrigeration equipment, natural draft boilers, gas-fired units, induced draft boilers, forced draft boilers and or duct strip heaters, and includes alarm circuits for added safety.
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